Because, as humans, we are limited in our conscious minds to the extent of only four dimensions, we normally have only a blinkered view of reality. Since we are all time travelers, but are limited on the one way road of traveleing exactly one second per second into the future, we are forced, by this limited perception of reality, into seeing everything in terms of cause and effect. But there are problems inherent with this perception of reality. It is obviously flawed.
Now, it is only a matter of common sense that tells us that when we pull a trigger, the gun fires. Cause and effect. And it is that common sense that blinds us to reality. You see, there is no one way street to time. The past present and future exist all at once. That’s why it makes no sense to ask “What existed before the big bang,” or “What existed before God?” Time isn’t a reality, like that. It’s only our limited consciousness on the road of time.
Think about it this way. Oedipus kills his dad, and because of that ends up marrying his mother. But he killed his dad because he was trying to get away from his adopted parents. He was doing that because he heard a prohecy saying he was going to kill his father and marry his mother. So did the propghecy end up causing the prophecy to be fulfilled?
In terms of a story, that makes perfect and obvious sense. But think about it. The prophet Tiresias KNEW that Oedipus would kill his father and marry his mother. He KNEW it. And he says, in Sophocles’ play Oedipus the King, that it doesn’t matter what he saiys, it will all come true.
You see the future is already there. It exists. God sees the future as if it were a photograph tacked to a wall. He knows what will happen. There is a destiny.
But since we exist in time, we play through the actions and decisions of our lives. Our free will allows us choice and we make decisions based on the effect of our actions. We MUST behave this way, and we know that our wills are free. But only through our limited perceptions do we actually believe that God does not see the effect and cause as simultaneous ocurrences. This makes my head hurt.
So, when God created the universe, he also created the illusion of time, a dimension which we travel in one direction only. But at the moment of creation, the end of time, the moments we live and the very first instant, all exist spread out before God in all its glory, according to His great design.